Continuous Professional Development(CPD)
Authored by Parameswaran Sajeenthiran
Professional Development
Professional Development
Used 1+ times
AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following built-in method is used to remove the last element from an array and return that element?
last()
pop()
get()
None of the above.
Answer explanation
The pop() method is the correct answer. It is used to remove the last element from an array and return that element.
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What would be the output of the following Javascript code?
var string1 = "Fee";
var intvalue = 10000;
alert( string1 + intvalue );
Fee 10000
10000
Fee10000
Exception
Answer explanation
Fee10000 is the correct answer. After concatenation, both the strings are shown as a concatenated string.
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following function of the Array object is used to add one or more elements to the front of an array and returns the new length of the array?
splice()
unshift()
sort()
toString()
Answer explanation
"unshift()" is the correct answer. It is used to add one or more elements to the front of an array and returns the new length of the array.
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Which of the following is not a JavaScript Data Types?
Boolean
Undefined
Number
Float
Answer explanation
"Float" is the correct answer. JavaScript supports only the following Data types:Number, String, Boolean, Object, and Undefined
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
What will be the output of the following code snippet?
var a = 1;
var b = 0;
while (a <= 3) {
a++;
b += a * 2;
console.log(b);
}
4 10 18
1 2 3
1 4 7
None of the above
Answer explanation
The loop will run 3 times, before meeting the exit condition. First value of b will be 2 2 = 4, followed by 4 + 3 2 = 10, and then value of 10 + 4 * 2 = 18.
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Why is ref used in React js?
To bind the function.
To call A function
to Directly access A DOM node
To refer a another js file
Answer explanation
Ref is used to directly access the DOM node.
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports
Continue with Google
Continue with Email
Continue with Microsoft
or continue with
%20(1).png)
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?
